Dust-guard.



No. 743,177. PATENTBD NOV. 3, 1903..

J. MALTRY.

DUST GUARD. APPLICATION FILED JAN. 26, 1903.

NO MODEL.

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JOHN MALTRY, OF OMAHA, NEBRASKA.

DUST-GUARD.

SPECIFICATION forming part of Letters Patent No. 743,177, dated November 3, 1903.

Original application filed October 25, 1901, Serial No. 79,984. Divided and this application filed January 26, 1903. Serial No.140,532. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN MALTRY, a citizen of the United States, and a resident of Omaha, in the county of Douglas and State of Nebraska, have invented a new and Improved Dust-Guard, of which the following is a full, clear, and exact description.

This invention relates to a dust-guard intended especially for the journal-boxes of railway rolling-stock, and the present application is a division of my former application, Serial No. 79,984, filed October 25, 1901.

The invention comprises the combination, with the inner open end of the oil-box, of two peculiarly-arranged collars spaced by a ring and held yieldingly against the oil-box by means of spring-pressed rods which are ongaged with the axle-box in a peculiar manner to be hereinafter described.

This specification is an exact description of one form of the invention, while the claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indi cate corresponding parts in all the views.

Figure l is a vertical section of the invention, showing it applied. Fig. 2 is a horizontal sect-ion thereof. Fig. 3 isa rear elevation showing the axle in section, and Fig. 4 is a detail elevation of the inner guard-plate.

a indicates the axle,having the enlargement a thereon. b indicates the axle-box, and 0 indicates the oil-receptacle, which is fitted in the axle-box so as to be incapable of longitudinal movement therein. All of these parts are essentially the same as those described in my application above mentioned.

02 indicates the inner guard-plate, which is of essentially circular form, with a central orifice fitted snugly to the enlargement a of the axleand formed with ears 01, having radially-disposed slots (1 therein for a purpose to be hereinafter fully stated. e indicates the outer guard-plate,which is preferably formed heavier than the inner guard-plate and provided with lugs 9, corresponding to the lugs at, these lugs 6' being, however, orificed in-- stead of slotted. Bearingbetween the guardplates d and c is an annulus f, which spaces the guard-plates apart and encircles the axle,

as shown. These parts (1, e, and f are held firmly yet yieldingly in place by means of tierods 9, which are projected through the ears 6 and engaged therewith by cotter-pins g, as shown best in Fig. 3. The tie-rods g extend outward from the plate 6 through the slots (1 of the ears (1 and through orifices in ears 1), formed on or fastened securely to the sides of the axle-box b.

9 indicates spiral springs which encircle the rods g and serve to actuate the rods to draw the parts (1, c, and f yieldingly yet firmly in place. The tension of these springs 9 may be regulated at will by nuts 9 working on the rods g, as shown. By this arrangement it will be observed that pressure is first communicated from the springs g to the rods 9 and plate a and that through the annulus f the plate at is pressed firmly up against the inner side of the oil-receptacle c. This arrangement forms a double closure at the inner end of the oil-chamber. If desired, a gasket may be placed around the axle within the oil- 'receptacle 0 and directly adjacent to the plate (1, and also the space within the annulnsf may be filled with packing or the like, thus not only preventing the leakage of oil from the receptacle 0, but also efiectively preventing the entry of dust thereinto.

Various changes in the form, proportions, and minor details of the invention may be resorted to at will without departing from the spirit and scope thereof. Hence I consider myself entitled to all such Variations as may lie within the intent of my claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1.. A dust-guard for axle-boxes, comprising the combination with the box and axle, of a guard-plate encircling the axle and engaged with the inner end of the axle-box, a second guard-plate encircling the axle inward of the first guard-plate, a metallic annulus bearing between the guard-plates and spaced from the axle to form a packing-receptacle surrounding the axle, and means for drawing the inner guard-plate yieldingly toward the outer or first-named guard-plate, said annulus holding the plates spaced from each other.

2. A dust-guard for axle-boxes, comprising to yieldingly draw the outer guard-plate to- 10 the combination with the axle-box, of two Ward the axle-box, for the purpose specified. guard-plates adapted to encircle the axle, an In testimony whereof I have signed my annulus encircling the axle and bearing bename to this specification in the presence of tween the guard-plates, rods attached to one two subscribing Witnesses.

guard-plate and extending loosely past the JOHN MALTRY. other, said rods having sliding connectioni Witnesses:

with the axle-box, and springs bearing be- I MELCHIOR LEIS, tween the rods and portions of the axle-box F. M. HUNLING. 

